port_range lvar is not defined

Author: ko1

lib/debug/server.rb

@@ -402,7 +402,7 @@ def initialize host: nil, port: nil
       @port_range = if @port.zero?
         0
       else
-        port_range_str = (port_range || CONFIG[:port_range] || "0").to_s
+        port_range_str = (CONFIG[:port_range] || "0").to_s
         raise "Specify a positive integer <=16 for port range" unless port_range_str.match?(/\A\d+\z/) && port_range_str.to_i <= 16
         port_range_str.to_i
       end

test/support/test_case.rb

@@ -180,6 +180,9 @@ def setup_remote_debuggee(cmd)
           msg1 = true
         when /\ADEBUGGER: wait for debugger connection/
           msg2 = true
+        else
+          # unknown lines
+          STDERR.puts "> #{line}"
         end
 
         break if msg1 && msg2